Automatic braking device



April 1939! c. s. CORZINE AUTOMATIC BRAKING DEVICE Filed Nov. l 1937 T0 TRAILER BRA/(ES INVENTOR Patented Apr. 18, 1939 UNITED STATES PATENT OFFICE AUTOMATIC BRAKING DEVICE Chalmers S. Corzine, Dubuque, Iowa, assignor of ime-tenth to John W. Kintzinger, Jr., Dubuque,

owa

Application November 1, 1937, Serial No. 172,203

1 Claim. (01. 188-142) My invention relates to an improvement in Parts 4 and 5 are identical plates attached to the'art of automatic braking, when towing one each side of center plate 3 by bolts, pins, or rivets vehicle with another vehicle, either two or four 8 and 9, to form the yoke member on which is wheel trailers, or for attachment to towing bar pivoted the brake lever 2 by pivot, bolt, pin, or

5 used for tandem transportation of new vehicles rivet I.

from factory to dealer, or any other towing operl5 shows trailer tongue or tow bar (in part) ation, where more than one vehicle in tandem is attached to center plate 3 attached by bolts, pins, controlled by one operator or driver. or rivets Ill and l I.

While my invention utilizes an ancient prin- This device may also be made with ball and i0 ciple; that of leverage; it is a new and novel socket connections on lower end of brake lever 2 10 method o bringing this g a o e o p ay in in place of part I such ball and socket coupler, the art of automatic braking. As specifically I understand, is already patented. shown later herein, the more Weight pp d to This device is absolutely automatic, as to brakmy invention relatively that much more power ing principle, the relative speed of towed and i5 is applied to the brakes on the trailer. However, towing hi 1 governing same. If the speed of as 50011 as t e brakes on the 0941 are released the towing vehicle is reduced to less than that and car is accelerated, the brakes on the trailer of t towed hi 1 th towed vehicle pushes e automatically releasedforward on the tongue or tow bar, attaching it to I att t se j s y mechanism illustrated towing vehicle, and forces brake lever 2, to pivot in t e acco pa y drawing, in Which on 6 and l, swinging top of brake lever ahead and 20 Figure 1 s a s View of the complete pulling ahead on brake rod or cable, l3, which on y. Figure 2 is a front View Of the Complete trailer is attached to an equalizer bar, which in assembly, Figure 315 a Side View 0f assembly, with turn applies brakes. As soon as the towed vehi- Side Plate t removed Showing the bevel Pitch cles speed is reduced to that of the towing vehicle H, of center plate 3, and brake lever 2, in upit drops back; pulling back on tongue or t 25 right Posititm; Figure Same as Figure 31 With bar, which in turn pulls brake lever, 2, back to brake lever 2, in forward or braking position. the upright position, releasing t b k Similar u e refer to Similar Parts The same action takes place when descendin throughout the several view a hill; as the forward push or surge of the towed Part i is a coupling iiiik into the Siot of which vehicle on the tongue or tow bar sets the device 30 brake level 2, is inserted and pivoted f in action, and releases it again at the bottom of pin, or rivet 6, and is attached to a towing vehicle the descent by turned bolt end l-a formed on its lower ex- 1 am aware t t prior t my invention other tremity, which is adapted to be inserted through braking devices have been made; and as my i 35 hole in angle bar or other attachment fastened to Vention I c1a1m; 35 made part of towing Vehicie- A hitch for automatically operating a trailer Part 2 is a pivoting brake Operating lever brake mechanism comprising in combination a Which is pivoted in slot of Part i by bolt yoke member formed of a center plate and two rivet 5, and 31150 pivoting between Side piates side plates, the latter having portions extending 40 t and 5 on boit, pin or rivet Hole is below the center plate to form spaced-apart arms, 40 vided at top end for connection to a brake rod Said yoke member being adapted t b fixed t a or cable l3. The swing of this lever is controlled trailer and the center plate thereof have it by t pitch bevel formed on the lower halt lowermost face beveled; a brake operating lever of fro t end of center plate 3, which acts as pivotally mounted between the aforesaid arms bumper Stop for bittke lever formed by said side plates; and a tow bar piv- 45 Pa t 3 forms a Center plate of Y which is the otally connected to the forward end of said brake connecting link between device and tongue or tow Operating lever whereby a pull on t t bar bar; suc Center Plate being located between Side forwardly of the trailer effects a rotation of said plates 4 and 5 and immediately behind brake brake operating lever in a direction away from level 2 and acts as stop bumper brake said beveled face, and a push of the tow bar 50 lever it s attached between Side piates and towards the trailer effects a rotation of said brake 5 by bolts, pins, rivets 3 and Pitch bevei operating lever in the opposite direction and into ll formed on the lower half of front end of cenengagement with Said beveled face to apply the ter plate 3 determines the swing or pull at the trailer brakes top end of brake lever 2. To the plate 3 is cou- CHALMERS S. CORZINE. 55

pled tongue or towing bar by bolts, pins, or rivets l0 and H. 

